Engine/Trans Seriously Bad Noise

It's a stock stroke and all the plugs are pulled and look just fine. There is a windage tray but I don't think the stroke has enough in it to hit that. And I believe all the slugs were tig welded into the crank. The block isn't sleeved either. This is a very fast repetitive noise that follows the rpm band. The trans is now out and being looked at. Will keep everyone updated. Thanks.